CN210460887U

CN210460887U - Balance shaft top cover

Info

Publication number: CN210460887U
Application number: CN201921458132.3U
Authority: CN
Inventors: 钟建斌
Original assignee: Zhejiang Boyi Technology Co ltd
Current assignee: Zhejiang Boyi Technology Co ltd
Priority date: 2019-09-03
Filing date: 2019-09-03
Publication date: 2020-05-05
Anticipated expiration: 2029-09-03

Abstract

The utility model belongs to the technical field of engines, in particular to a balance shaft top cover, which comprises a cover body, wherein the left side part of the cover body can cover a driving gear driving the balance shaft to rotate, the right side part of the cover body is provided with an assembly shaft hole for assembling the balance shaft, and an oil seal shaft sleeve is sleeved in the assembly shaft hole; the rear end face of the cover body is provided with an annular groove along the edge of the rear end face of the cover body, a sealing ring is arranged in the annular groove, an oil injection channel penetrating through the cover body is arranged on the left side portion of the cover body, a one-way mechanism is arranged in the oil injection channel, and the one-way mechanism can prevent engine oil from flowing to the front end of the oil injection channel from the rear end of the oil injection channel. The utility model discloses the lid can seal balance shaft and driving gear simultaneously, has seted up the oiling passageway on the lid, can be to driving gear and balance shaft filling machine oil through the oiling passageway to prevent machine oil from the oiling passageway to the external adverse current with the help of single-way mechanism, its spare part is few, simple structure, leakproofness are good, machine oil filling operation is convenient and machine oil is difficult for leaking.

Description

Balance shaft top cover

The technical field is as follows:

the utility model belongs to the technical field of the engine, refer in particular to a balance shaft top cap.

Background art:

in a normal working cycle of the engine, reciprocating inertia force of the piston is difficult to balance due to extremely high and uneven up-and-down reciprocating speed of the piston, and the reciprocating inertia force needs to be balanced through a balance shaft so as to reduce shaking of the engine.

The balance shaft is driven by the crankshaft through the driving gear to rotate, the balance shaft, the crankshaft and the driving gear thereof all need to be lubricated by engine oil, however, the existing balance shaft and the driving gear all adopt an independent sealing mode, and meanwhile, an engine oil filling structure and a sealing structure are also separately and independently arranged, so that the balance shaft, the crankshaft and the driving gear thereof are more in parts, complex in structure, inconvenient in engine oil filling operation and easy to leak, and therefore the sealing of the balance shaft, the crankshaft and the driving gear thereof is a focus problem in the field of engine design and manufacturing.

The invention content is as follows:

the utility model aims at providing a balanced axle top cap that the leakproofness is good, can fill machine oil.

The utility model discloses a realize like this:

a top cover of a balance shaft comprises a cover body, wherein the left side part of the cover body can cover a driving gear for driving the balance shaft to rotate, an assembly shaft hole for assembling the balance shaft is formed in the right side part of the cover body, and an oil seal shaft sleeve is sleeved in the assembly shaft hole; the rear end face of the cover body is provided with an annular groove along the edge of the rear end face of the cover body, a sealing ring is arranged in the annular groove, an oil injection channel penetrating through the cover body is arranged on the left side portion of the cover body, a one-way mechanism is arranged in the oil injection channel, and the one-way mechanism can prevent engine oil from flowing to the front end of the oil injection channel from the rear end of the oil injection channel.

In foretell balanced axle top cap, one-way mechanism has seted up the oil filling passageway including radially setting up in the oil filling passageway and carrying out the divided baffle with the oil filling passageway on the baffle, and the trailing flank center of baffle is provided with the fixed axle, and the cover is equipped with the one-way valve block that can cover the oil filling passageway on the fixed axle, is located to be fixed with the check valve apron on the fixed axle of one-way valve block rear side, passes through compression spring elastic connection between the rear end face of one-way valve block and the preceding terminal surface of check valve apron.

In the balance shaft top cover, the one-way valve cover plate can plug the rear end of the oil injection channel, the cover body is provided with the flow guide channel, one end of the flow guide channel is communicated with the oil injection channel positioned at the rear side of the one-way valve plate, and the other end port of the flow guide channel is arranged on the rear end face of the cover body and corresponds to the axis position of the driving gear.

In the above balance shaft top cover, the front end face of the one-way valve cover plate is provided with the outer cylinder, the cylinder wall face of the outer cylinder is in contact connection with the inner wall face of the oil injection channel to block the oil injection channel by the one-way valve cover plate, the outer cylinder is provided with a notch corresponding to the corresponding end position of the flow guide channel, and the notch is a channel through which engine oil flows into the flow guide channel from the oil passage.

In the balance shaft top cover, the rear end face of the cover body is provided with a flow guide groove, one end of the flow guide groove is communicated with the oil injection channel, the side edge of the one-way valve end cover extends outwards to form an extending part, the extending part covers the notch of the flow guide groove, and the flow guide channel is formed between the extending part and the flow guide groove.

In the balance shaft top cover, the cover bodies positioned on the upper side and the lower side of the flow guide groove are respectively provided with a positioning groove, and the extending part is provided with a positioning bulge inserted in the positioning groove.

In the above-mentioned balance shaft top cap, a plurality of radial reinforcing ribs are uniformly distributed on the front end surface or/and the rear end surface of the cap body in a divergent manner circumferentially around the axis of the assembly shaft hole.

In the balance shaft top cover, the front end surface or/and the rear end surface of the cover body is/are provided with an annular reinforcing rib which takes the axis of the assembling shaft hole as the center of a circle, and the annular reinforcing rib and the radial reinforcing rib are of an integrated structure.

In the above-described one of the balance shaft caps, the thickness of the radial reinforcing ribs gradually becomes thicker radially outward of the fitting shaft hole.

In the balance shaft top cover, a positioning baffle plate for positioning and connecting with the engine shell is arranged on the rear end surface of the cover body.

Compared with the prior art, the utility model outstanding advantage is:

the utility model discloses the lid can seal balance shaft and driving gear simultaneously, its sealing washer can play sealed effect when lid and engine housing assembly, the oil blanket axle sleeve can play sealed effect when assembly shaft hole and balance shaft assembly, and simultaneously, the oiling passageway has been seted up on the lid, can be to driving gear and balance shaft filling machine oil through the oiling passageway, and prevent machine oil from the outside adverse current of oiling passageway with the help of single mechanism, its spare part is few, moreover, the steam generator is simple in structure, the leakproofness is good, convenient and the machine oil is difficult for leaking of machine oil filling operation.

Description of the drawings:

fig. 1 is a first perspective view of the present invention;

fig. 2 is a rear view of the present invention;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;

fig. 4 is an exploded view of the present invention;

fig. 5 is a second perspective view of the present invention;

FIG. 6 is a partial enlarged view at B in FIG. 5;

fig. 7 is a perspective view of the check valve cover plate of the present invention.

In the figure: 1. a cover body; 2. assembling the shaft hole; 3. an oil seal shaft sleeve; 4. an annular groove; 5. a seal ring; 6. An oil injection channel; 7. an oil injection joint; 8. a partition plate; 9. an oil passing channel; 10. a fixed shaft; 11. a one-way valve plate; 12. a one-way valve cover plate; 13. a compression spring; 14. an outer cylinder; 15. a notch; 16. a flow guide groove; 17. an extension portion; 18. a positioning groove; 19. positioning the projection; 20. radial reinforcing ribs; 21. an annular reinforcing rib; 22. and positioning the baffle.

The specific implementation mode is as follows:

the invention will now be further described with reference to specific embodiments, with reference to figures 1 to 7:

a top cover of a balance shaft comprises a cover body 1, wherein the left side part of the cover body 1 can cover a driving gear for driving the balance shaft to rotate, an assembly shaft hole 2 for assembling the balance shaft is formed in the right side part of the cover body 1, and an oil seal shaft sleeve 3 is sleeved in the assembly shaft hole 2; the rear end face of the cover body 1 is provided with an annular groove 4 along the edge of the rear end face, a sealing ring 5 is arranged in the annular groove 4, an oil injection channel 6 penetrating through the cover body 1 is arranged on the left side portion of the cover body 1, a one-way mechanism is arranged in the oil injection channel 6, and the one-way mechanism can prevent engine oil from flowing to the front end of the oil injection channel 6 from the rear end. In the embodiment, the front end of the oil injection channel 6 is connected with the oil injection joint 7, and the oil injection channel 6 can be filled with oil through the oil injection joint 7 when the engine oil is filled, so that the engine oil filling operation is facilitated.

The utility model discloses lid 1 can seal balance shaft and driving gear simultaneously, its sealing washer 5 can play sealed effect when lid 1 assembles with the engine housing, oil blanket axle sleeve 3 can play sealed effect when assembling shaft hole 2 and balance shaft, and simultaneously, oiling passageway 6 has been seted up on the lid 1, can annotate machine oil to driving gear and balance shaft through oiling passageway 6, and prevent machine oil from annotating 6 outside adverse currents of passageway 6 with the help of single-way mechanism, its spare part is few, moreover, the steam generator is simple in structure, the leakproofness is good, convenient and the machine oil is difficult for leaking of machine oil filling operation.

Furthermore, the one-way mechanism can adopt an electromagnetic valve, namely when the engine works normally, the electromagnetic valve is in a closed state, and the electromagnetic valve is opened only when engine oil needs to be filled, and the engine oil is filled. Of course, the one-way mechanism can also adopt a one-way ball valve in the prior art.

In this embodiment, the specific implementation of the one-way mechanism is as follows: the one-way mechanism comprises a partition plate 8 which is radially arranged in the oil injection channel 6 and divides the oil injection channel 6, an oil passing channel 9 is formed in the partition plate 8, a fixing shaft 10 is arranged at the center of the rear side face of the partition plate 8, a one-way valve plate 11 capable of covering the oil passing channel 9 is sleeved on the fixing shaft 10, a one-way valve cover plate 12 is fixed on the fixing shaft 10 located on the rear side of the one-way valve plate 11, and the rear end face of the one-way valve plate 11 is elastically connected with the front end face of the one-way valve cover plate 12 through a compression spring. When the engine works normally, the one-way valve plate 11 is tightly abutted against the partition plate 8 under the elastic force of the compression spring 13 and the pressure of engine oil in the engine shell, so that the oil filling channel 6 and the oil passing channel 9 are blocked; when engine oil needs to be filled, the external high-pressure engine oil needs to overcome the elastic force of the compression spring 13 and the pressure of the engine oil, so that the oil filling channel 6 and the oil passing channel 9 can be communicated, and then the engine oil can be filled.

The position of filling machine oil is reasonably optimized, the lubricating effect of the driving gear is improved, the rear end of the oil filling channel 6 can be blocked by the check valve cover plate 12, a flow guide channel is arranged on the cover body 1, one end of the flow guide channel is communicated with the oil filling channel 6 located on the rear side of the check valve plate 11, and the other end port of the flow guide channel is arranged on the rear end face of the cover body 1 and corresponds to the axis position of the driving gear.

Furthermore, the specific embodiment that the check valve cover plate 12 can block the rear end of the oil filling channel 6 is as follows: the front end face of the one-way valve cover plate 12 is provided with an outer cylinder 14, the wall face of the outer cylinder 14 is in contact connection with the inner wall face of the oil injection channel 6, namely the one-way valve cover plate 12 is used for plugging the oil injection channel 6 in a face-to-face sealing mode, the outer cylinder 14 is provided with a notch 15 corresponding to the corresponding end position of the flow guide channel, and the notch 15 is a channel through which engine oil flows into the flow guide channel from the oil passage 9.

Meanwhile, in order to facilitate production and processing of the flow guide channel, the rear end face of the cover body 1 is provided with a flow guide groove 16, one end of the flow guide groove is communicated with the oil injection channel 6, the side edge of the one-way valve end cover extends outwards to form an extension portion 17, the extension portion 17 covers the notch of the flow guide groove 16, and the flow guide channel is formed between the extension portion 17 and the flow guide groove 16.

Furthermore, because the flow guide channel is formed by combining the extension part 17 of the one-way valve cover plate 12 and the flow guide groove 16, in order to avoid circumferential deviation of the one-way valve cover plate 12 relative to the flow guide groove 16, the cover bodies 1 positioned at the upper side and the lower side of the flow guide groove 16 are respectively provided with a positioning groove 18, and the extension part 17 is provided with a positioning bulge 19 inserted in the positioning groove 18. The positioning groove 18 and the positioning bulge 19 are mutually matched to realize the circumferential positioning of the one-way valve cover plate 12 and simultaneously facilitate the installation operation of the one-way valve cover plate 12.

In addition, when the engine normally works, the balance shaft generates an inertia force opposite to the inertia force direction of the engine in order to reduce the inertia force of the engine, therefore, the cover body 1 and the assembly shaft hole 2 thereof for being assembled with the balance shaft should have high bearing strength to ensure that the cover body can bear the inertia force load of the balance shaft, and a plurality of radial reinforcing ribs 20 are distributed on the front end surface or/and the rear end surface of the cover body 1 in a divergent mode and in the circumferential direction by taking the axis of the assembly shaft hole 2 as the center.

The bearing strength of the cover body 1 and the assembling shaft hole 2 is further improved, the front end surface or/and the rear end surface of the cover body 1 are/is provided with an annular reinforcing rib 21 which takes the shaft center of the assembling shaft hole 2 as the center of a circle, and the annular reinforcing rib 21 and the radial reinforcing rib 20 are of an integrated structure.

At the same time, the thickness of the radial ribs 20 becomes gradually thicker outward in the radial direction of the fitting shaft hole 2.

Besides, in order to facilitate the assembly operation of the present invention, a positioning baffle 22 for positioning and connecting with the engine housing is provided on the rear end face of the cover body 1.

The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so: all equivalent changes made according to the shape, structure and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A balance shaft top cap which is characterized in that: the oil seal cover comprises a cover body (1), wherein the left side part of the cover body (1) can cover a driving gear for driving a balance shaft to rotate, an assembly shaft hole (2) for assembling the balance shaft is formed in the right side part of the cover body (1), and an oil seal shaft sleeve (3) is sleeved in the assembly shaft hole (2); the rear end face of the cover body (1) is provided with an annular groove (4) along the edge of the rear end face, a sealing ring (5) is arranged in the annular groove (4), an oil injection channel (6) penetrating through the cover body (1) is arranged on the left side portion of the cover body (1), a one-way mechanism is arranged in the oil injection channel (6), and the one-way mechanism can prevent engine oil from flowing to the front end of the oil injection channel (6) from the rear end.

2. A balance shaft cover according to claim 1, wherein: one-way mechanism has seted up oil filling channel (9) including radially setting up in oil filling channel (6) and carrying out divided baffle (8) with oil filling channel (6) on baffle (8), the trailing flank center of baffle (8) is provided with fixed axle (10), the cover is equipped with one-way valve piece (11) that can cover oil filling channel (9) on fixed axle (10), be located fixed with check valve apron (12) on fixed axle (10) of check valve piece (11) rear side, through compression spring (13) elastic connection between the rear end face of one-way valve piece (11) and the preceding terminal surface of check valve apron (12).

3. A balance shaft cover according to claim 2, wherein: the rear end of the oil injection channel (6) can be blocked by the check valve cover plate (12), a flow guide channel is arranged on the cover body (1), one end of the flow guide channel is communicated with the oil injection channel (6) located on the rear side of the check valve plate (11), the other end of the flow guide channel is arranged on the rear end face of the cover body (1) and corresponds to the axis position of the driving gear.

4. A balance shaft cover according to claim 3, wherein: an outer cylinder (14) is arranged on the front end face of the one-way valve cover plate (12), the wall face of the outer cylinder (14) is in contact connection with the inner wall face of the oil filling channel (6) to seal the oil filling channel (6) by the one-way valve cover plate (12), a notch (15) corresponding to the corresponding end position of the flow guide channel is formed in the outer cylinder (14), and the notch (15) is a channel through which engine oil flows into the flow guide channel from the oil passing channel (9).

5. A balance shaft cover according to claim 3 or 4, wherein: the rear end face of the cover body (1) is provided with a flow guide groove (16) with one end communicated with the oil injection channel (6), the side edge of the one-way valve end cover extends outwards to form an extending portion (17), the extending portion (17) covers the notch of the flow guide groove (16), and the flow guide channel is formed between the extending portion (17) and the flow guide groove (16).

6. The balance shaft cover according to claim 5, wherein: positioning grooves (18) are formed in the cover body (1) on the upper side and the lower side of the flow guide groove (16), and positioning protrusions (19) inserted into the positioning grooves (18) are arranged on the extending portion (17).

7. A balance shaft cover according to claim 1, wherein: the front end face or/and the rear end face of the cover body (1) are/is provided with a plurality of radial reinforcing ribs (20) in a divergent mode in the circumferential direction by taking the axis of the assembling shaft hole (2) as the center.

8. The balance shaft cover according to claim 7, wherein: the front end face or/and the rear end face of the cover body (1) are/is provided with an annular reinforcing rib (21) which takes the axis of the assembling shaft hole (2) as the center of a circle, and the annular reinforcing rib (21) and the radial reinforcing rib (20) are of an integral structure.

9. The balance shaft cover according to claim 7, wherein: the thickness of the radial reinforcing rib (20) gradually becomes thicker along the radial direction of the assembling shaft hole (2).

10. A balance shaft cover according to claim 1, wherein: and a positioning baffle (22) for positioning and connecting with the engine shell is arranged on the rear end face of the cover body (1).